SpriteView is a small, speedy graphics viewer (not editor) that supports several formats of console systems (including all of those used by the SNES). For those interested, the readme documents the formats for the various modes it supports. Although mainly meant to display the console graphics contained in either savestates or ROM images, it can also display graphics from other sources like DOOM's WAD file, Windows 95's ShellIconCache file, DLLs, and executables.
SNES 1,2,3,4,8bpl tiles
SNES mode 7 linear/interleaved tiles
SNES fx chip low/high nybble linear
NES 2bpl tiles
GameBoy 2bpl tiles (same as SNES 2bpl)
Sega 4bit tiles
VB 2bit tiles
N64 15bit high color linear
N64 24bit true color linear
Generic 2,4,8bit linear
Increased maximum wrap width to 1024, hopefully sufficiently large enough for any graphic entity. Also good for scrolling through a huge file really fast.
Added anti-thrashing routine now to spare your hard disk an early death when loading huge files.